Anchoring apparatus



June 10, 1930'. 1 H, PHILLIPS 1,762,349

ANCHORING APPARATUS Filed May 29, 1925 Patented `lune 10,

'PT'ENT ePrice A:onu ii. ieHiLtIrs, or cHioAeo, ILLINOIS Aircnnineirannriis incanta met nay 29,

: may be employed to drill a relatively large number 'of holes inconcrete, stone or the like and may be readily expanded in one 'of theholes to fscrve `as an anchor bolt. Another particular 'object of the'invention' is to 'provide' an expansible self-drilling anchoringdevicewhich Will firmly engage the Walls of a haie throughout the entirelength of the hole after it 'has been expanded thereinp Many otherobjects-'and advantages of the construction herein shown and describedwill be obvious to th'oseskilled in the 'art from the disclosure hereingiven. f

To this end my invention consists in the novel construction, arrangementand combi- 5 nation of parts herein shown and described, `'and moreparticularlyfpointed out in the claims. l

In the drawings, wherein likereference characters `indicate like orcorresponding opartsa y i y Fig. 1 is an elevation of an anchoringdeviceiem'loodying the novel features of my invention, the anchoringdevice being shown in connection with a chuck whereby it may be 35.secured in afspring hammer orthe like; s

. .Figl 2 is a longitudinal section taken through my improved anchoringdevice, the

\ anchoring device being shown in its expand ed condition; s 0l .Figi 3is an `enlarged fragmentary section `takensubstantially on the'same lineas Fig. `2, but A"showing certain features 'of construcy'tion in vmoredetail;

Fig. 4 is `a section taken on line 4-``4 of .Fi-g1; .1 Y i Fig. 5 is asection taken on Yline 5-25 of Fig. All;l l. y s

Fig. 6 is `an end elevation of the improved anchoring device; v Figs. 7and `8 are sections taken on lines itat. sriai iid. aejwe.

7-7 and 8-8, respectively, of Fig. 6; and

Fig. 9 is a fragmentary elevation of an anchoring device embodyinganother form of the invention.

In the drawings, 10 is a tubular shell 55 formed of any V"suitablemetal, such as forexs `ample case-hardened steel. The shell 10 isrprovided at one end with drill teeth 16 and 17 and "at its other end iscollapsed to provide a tongue 19 which comprises superimposed 60 layersof metal. The tongue 19 may be inserted in a chuck 2O secured in aspring hammer or 'any other suitable device adapted to impart areciprocatory motion to the shell. An aperture 21 is formed in thetongue v19 65 and aligned apertures 22 are formed in the chuck 20 sothat the shell may be attached to the chuck by a pin or bolt (not shown)passed through the `apertures 21 and 22 if the drill tends to stick in ahole when it is to he withdrawn therefrom.

Intermediate the ends of the shell 10 are provided `a plurality ofannular teeth 25 which have large diameters substantially equaling thelargest diameter of the drilling end of the shell. In thedrillingoperation the teeth 25 are adapted to assist the teeth 16 and 17in removing material from the sides of the hole drilled into a ceiling28 of concrete or drilled into any other wall or article. This negativesthe necessity of allowing the clearance which is usually allowed ondrill 'Shanks and the like and insures that the shell will snugly fitthe hole' if it is subsequently expanded therein. The

`shell 10 is preferably provided with a plurality of slots 30 formingweakened portions 31 adjacent the teeth 16 and 17 and forming passageswhereby material removed from the bottom of the hole may pass from theshell.

In practice, after the shell 41() has been employedto `drill asubstantially cylindrical hdle 27 ina ivall 'or Ian object, it isremoved therefrom, `and if `it is to be secured in this hole, 95 `atapered plug 33 is seated in its drilling end, the plug being preferablyformed of casehardened steel -or the equivalent.` The shell 10 is againdriven :in the hole 27 by any suitable means and during this seconddrill- `wling member and through the aperture 21 in the tongue. f

ing operation the plug 33 causes the drilling end of the shell to expandin the manner illustrated in Fig. 2, the weakened portions 31 beingfractured. The teeth 25 and the teeth 16 and 17 enlarge the inner end ofthe hole 27 as indicated at 35 and the shell 1() becomesiirmly fixed inthe hole, as at the end of the second drilling each of the annular teeth25 are imbedded in the Wall of the hole and each forms a head of greaterdiameter than the diameter of the hole just back 0f it. As explainedabove, the shell 10 will snugly lit the hole throughout 'the entirelength thereof. Another featureof my invention is that some of thematerial removed by the teeth 25 when the shell is driven into the holefor thesecond time packs in between the teeth 25 and wedges the shell inthe hole.

After the shell 10 has been expanded and seated in the hole 27 theapparatus or article which is to be carried by the shell may be securedthereto by any suitable means. Obviously, anysuitable coupling member(not shown) could be secured to the tongue 19 by passing a bolt (notshown) through the coup- In the preferred embodiment of the invention,the teeth 16 are primarily designed to remove material from the bottomof the hole during the drilling. operation and the teeth 17 are sodesigned'that they crowd the material intothe interiorof the shell sothat it may pass out through the slots 30.' Of course,

both the teeth 16 and the teeth 17 removematerial from the sides of thehole.

f It will be readily understoodthatl the shell 10 can be employed todrill a plurality of holes 27. This will permit cheaper eXpansion shellsi to be driven into the holes to serve as anchor devices, the shell 10being expanded in one of the holes when it becomes worn. The cheaperexpansion shells may be of the type shown in my co-pendingapplicaplurality of annular teethL so formed thaty tion Serial No.33,775, filed May 29, 1925.

In a preferred embodiment of the invention, the tapered plug 38 isprovided with a they do not tend to seize and bite into the shell whenthe plug is driven thereinto, but so formed that they will resistWithdrawal `of the plug from the shell or withdrawal of the shell .fromthe plug. This insures that the. shell will remain irmly seated in thehole.

As hereinbefore set forth, both the shell and plug are preferablyhardened, as this constructiony permits rapid driving of the shell intothe hole and prevents the teeth 16 and 17 from biting into the plug.Hardening the shell throughout its entire length stid'ens it and permitsit to be used a maximum num-V ber of times as a'drill,fas well asinsuring a minimum Vof distortion. thereof during the initial drillingoperation.v 4

In Fig. 9, I have .shown another Vforni of the invention embodied in ashell 10a which in any suitable hammer device to drive the shellintoconcrete or the like, the shell being preferably rotated or oscillatedduring the drilling operation. Of course, the shell 10a may also beemployed to drill a plurality of holes and be expanded in one of them inthe manner described above. c

Shells embodying the invention may be formed from pipe, tubing, orplates, or may lbe cast if it is so preferred. In some instances,

the shells may consist ofl aplurality of complementary sectionsembodying the invention.

Having thus described my invention,it is obvious that various immaterialmodifications maybe madein the same without departing from the spirit ofmy invention; hence I do not wish to be understood as limiting myself tothe exact form, construction, arrangement and combination of partsherein shownand described, or uses mentioned.

What I claim as new anddesire to secure by Letters Patent is: Y

1. A tubularanchor shell embodying drilling teeth at one of its ends,frangible members adjacent said end permitting expansion of said shellwhen broken, a chuck engaging portion at the other Vof its ends, meanswhereby cooperating parts may be attached directly to the shell afterremoval of the chuck, and cutting means intermediate the ends of theshell. Y

2. An expansible tubular anchor shell embodying drilling teeth at one ofits ends, frangible means adjacent said end, an externally taperedportion at the other of its ends Whereby it maybe secured in a chuck,the tapered portion being providedl with internal Vscrew threads, andcutting means formed intermediateits ends. Y

3. An eXpansible tubular anchor shell embodying drilling teeth at one ofits ends, frangible means adjacent said end, an externally taperedportion at the other of its ends, whereby Vit may be secured in a chuck,the tapered portion having means for operatively engaging apparatus tobe carried by the shell,

intermediving means at the. other end, and a plurality of annularcutting teeth of equal diameters formed intermediate the ends of theshell.

5. A cylindrical anchoring device having a central bore therethrough andcomprising drill teeth at one end thereof, frangible memhers adjacentsaid end and permitting expansion of said device when broken, said drillteeth having faces converging toward the longitudinal axis of the deviceto crowd drilled material into said bore.

6. A cylindrical anchoring device having a central bore therethrough andcomprising drill teeth at one end thereof, frangible mem bers adjacentsaid end and permitting expansion off said device when broken, saiddrill teeth each having faces converging toward the longitudinal axis ofthe device to crowd drilled material into said bore, and drill teethinterposed between the rst-mentioned drill teeth and differing therefromin form. In testimony whereof, I have hereunto signed my name.

JOHN H. PHILLIPS.

